The most common isotope of hydrogen is H¹ and this isotope has 0 neutrons
I'll try to explain this in the simplest way I've learned it.
What the last column basically meant was that if the second word of the compound has a negative ion charge
and contains oxygen it will give the the compound a name ending with -ate
329.10 g is the mass of 1.59 moles of Ca(ClO3)2